Two,kinds,common,silicone,oil, health Two kinds of common silicone oil in shampoos
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Owing tothe effect of silicone oil, the current shampoos make people's hair shiny andsmooth after washing. Silicone oil is a kind of very good lubricant, which cangreatly reduce the friction, make the hair smooth. Now, there are a lot ofcosmetics using silicone oil which made of a mixture of varioussilicon-containing compounds. Therefore,the role and status of silicone oil in shampoo are obvious. In the shampoo formulations,dimethylsilicone fluid and emulsion silicone are the commonly used types. Sincedimethylsilicone fluid and silicone emulsion are excellent material forlubricant, so shampoos which joined the dimethylsilicone fluid or siliconeemulsion will make the hair light and smooth after washing. It can be seen thatthe quality of dimethylsilicone fluid and silicone emulsion will fundamentallyaffect the shampoo quality. Siliconeemulsion with stable chemical property, non-volatile, non-flammable,non-corrosive to metal and uneasy to gel while exposed to air for a long time.Its character is white viscous liquid, almost no odor, do not dissolve in water(can be dispersed in water), ethanol, methanol, soluble in aromatichydrocarbons, aliphatic hydrocarbons and chlorinated hydrocarbons (such asbenzene, carbon tetrachloride, etc.). Siliconeemulsion widely used in cream, shaving cream, hair conditioner, shampoo, bathdetergent, cream and other cosmetics, the effect is very significant. Siliconeemulsion has excellent hair conditioning effect, makes the hair supple andelegant. It has good complementarity with the other cosmetics material in cosmetic, helps them tobetter play the role. Silicone emulsion has good breathability of flavors,sustaining the fragrance of essence, spices, can extend the perfume period. Silicone oilis a kind of different polymerization chain structure polysiloxane. It is madeof dimethyl dichlorosilane through hydrolysis to get polycondensation ringbody, the ring body by splitting, distill to generate low ring body, then putthe ring body, end plate agent, catalyst together to conduct telomerization canbe obtained various different polymerization mixtures, finally, removed lowboiling substance by reduced pressure distillation. Its properties arecolorless (or pale yellow), odorless, non-toxic, non-volatile liquids.Dimethylsilicone fluid is dissolved in water, methanol, glycol and-ethoxyethanol, mutually soluble with benzene, dimethyl ether, methyl ethylketone, carbon tetrachloride or kerosene, slightly dissolve in acetone,dioxane, ethanol and butanol. It has a small vapor pressure, high flash pointand ignition, lower freezing point. As the number of segments n different, themolecular weight is increased, and the viscosity also increased, thus siliconeoil has a variety of different viscosity, from 0.65 centistokes to a millioncentistokes. To prepare low viscosity silicone oil, acid clay can be used as acatalyst, and telomerization at the temperature of 180,or used sulfuric acid as a catalyst, telomerization at low temperatures, alkalinecan be used as catalysts to produce high viscosity silicone oil or viscousmaterial. Article Source:http://www.cosprm.com
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